Table 8. Final multiple linear regression model for the outcome “methods used to assess tooth discoloration”.

	β coefficient	t	p
Intercept a	0.5707	12.702	< .001
Undergraduate Institution:
Public vs. Private	0.1122	3.674	< .001
X vs. Private	-0.2427	-1.197	0.232
Lato Sensu - Operative Dentistry, Pediatric Dentistry, or Orofacial Harmonization?
Yes vs. No	0.0778	2.183	0.030
Highest degree:
Doctorate vs. Master’s	0.1120	2.252	0.025
Postdoctoral vs. Master’s	0.1722	2.160	0.031
X vs. Master’s	0.0108	0.244	0.807

^a Represents the reference level